Code
P0152
Generic
P — Powertrain
O2 Sensor Circuit High Voltage Bank 2 Sensor 1
Views:
UK: 22
EN: 25
RU: 24
AI status
Completed
Completed
100%
Causes
- Faulty Bank 2 Sensor 1 (upstream O2 sensor) producing a high voltage output
- Signal wire shorted to 12V or other power source
- Poor or missing ground for the sensor circuit or ECM
- Fuel system running rich (high fuel pressure, leaking injectors, faulty fuel pressure regulator)
- Contaminated sensor (oil, coolant, silicone, leaded fuel residues)
- Faulty PCM/ECM (rare)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor fuel economy
- Black smoke or strong fuel smell from exhaust under load
- Possible rough idle or hesitation if rich condition is severe
- Failed emissions/smog test
What to check
- Read freeze frame and stored codes; check for related codes (fuel trim, MAF, other O2 sensors).
- Visually inspect sensor wiring and connector at Bank 2 Sensor 1 for corrosion, damage, pin pushed out, melted insulation or rodent damage.
- Use a scan tool to monitor the Bank 2 Sensor 1 voltage at idle and during load; note if voltage is steady high (>0.8–0.9 V) or shorted to battery.
- Compare Bank 1 and Bank 2 sensor behavior and short/long term fuel trims for signs of real rich condition.
- Check fuel pressure and fuel injectors for leakage or stuck-open condition.
- Backprobe the sensor signal wire with a multimeter/oscilloscope to confirm voltage and waveform; wiggle harness to check for intermittent faults.
Signal parameters
- Typical narrowband O2 sensor signal range: ~0.0 V (lean) to ~1.0 V (rich).
- High-voltage condition commonly flagged when sensor voltage is consistently above ~0.8–0.9 V.
- When properly operating in closed loop, upstream sensor should switch regularly between low and high (several times per second depending on engine).
- Heater circuit: resistance and supply vary by sensor (typical resistance a few ohms to a few tens of ohms); heater should reach operating temperature quickly after start.
Diagnostic algorithm
- Connect a scan tool, record freeze frame and live data for Bank 2 Sensor 1, fuel trims, MAF, and related sensors. Note conditions (engine temp, load, RPM).
- Verify bank identification (confirm which bank is bank 2 on this engine).
- Visually inspect sensor harness and connector for damage, corrosion, or signs of short/high-temperature damage.
- With engine running and warmed, monitor the O2 sensor voltage. If it is fixed high (near 1.0 V) or does not switch, suspect sensor or true rich condition.
- Check short/voltage: key ON engine OFF backprobe the signal wire — it should not be battery voltage. With engine running, measure voltage; if constant battery voltage, trace for short to 12V in harness or connector.
- Check fuel system: measure fuel pressure, inspect injectors for leakage, and review short- and long-term fuel trims. High fuel pressure or positive fuel trims indicate actual rich condition.
- Inspect MAF/MAP/TP sensors and vacuum system; sensor faults upstream can cause incorrect fueling.
- Verify grounds and PCM connector integrity; measure resistance to ground from sensor ground circuit.
- If wiring, grounds and fuel system check good, replace Bank 2 Sensor 1 and clear codes.
- Road test and re-scan to confirm code does not return and sensor waveform/fuel trims return to normal.
Likely causes
- Contaminated or failed oxygen sensor (most common)
- Signal wiring short to battery voltage or pinched connector
- Excess fuel delivery (high fuel pressure or stuck-open injector) causing sensor to read rich
- Bad ground at sensor or ECM connector
- MAF or fuel trim sensor error causing rich running conditions
Fault status
Status
P0152 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): ECM detects sensor signal voltage higher than expected (rich/high-side or possible short to voltage).
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0152
GWM
P — Powertrain
- High oxygen sensor circuit voltage (bank 2, sensor 1)
Views:
UK: 1
EN: 0
RU: 1
AI status
Completed
Completed
100%
Causes
- Faulty Bank 2 Sensor 1 (upstream O2 sensor) producing a high voltage output
- Signal wire shorted to 12V or other power source
- Poor or missing ground for the sensor circuit or ECM
- Fuel system running rich (high fuel pressure, leaking injectors, faulty fuel pressure regulator)
- Contaminated sensor (oil, coolant, silicone, leaded fuel residues)
- Faulty PCM/ECM (rare)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor fuel economy
- Black smoke or strong fuel smell from exhaust under load
- Possible rough idle or hesitation if rich condition is severe
- Failed emissions/smog test
What to check
- Read freeze frame and stored codes; check for related codes (fuel trim, MAF, other O2 sensors).
- Visually inspect sensor wiring and connector at Bank 2 Sensor 1 for corrosion, damage, pin pushed out, melted insulation or rodent damage.
- Use a scan tool to monitor the Bank 2 Sensor 1 voltage at idle and during load; note if voltage is steady high (>0.8–0.9 V) or shorted to battery.
- Compare Bank 1 and Bank 2 sensor behavior and short/long term fuel trims for signs of real rich condition.
- Check fuel pressure and fuel injectors for leakage or stuck-open condition.
- Backprobe the sensor signal wire with a multimeter/oscilloscope to confirm voltage and waveform; wiggle harness to check for intermittent faults.
Signal parameters
- Typical narrowband O2 sensor signal range: ~0.0 V (lean) to ~1.0 V (rich).
- High-voltage condition commonly flagged when sensor voltage is consistently above ~0.8–0.9 V.
- When properly operating in closed loop, upstream sensor should switch regularly between low and high (several times per second depending on engine).
- Heater circuit: resistance and supply vary by sensor (typical resistance a few ohms to a few tens of ohms); heater should reach operating temperature quickly after start.
Diagnostic algorithm
- Connect a scan tool, record freeze frame and live data for Bank 2 Sensor 1, fuel trims, MAF, and related sensors. Note conditions (engine temp, load, RPM).
- Verify bank identification (confirm which bank is bank 2 on this engine).
- Visually inspect sensor harness and connector for damage, corrosion, or signs of short/high-temperature damage.
- With engine running and warmed, monitor the O2 sensor voltage. If it is fixed high (near 1.0 V) or does not switch, suspect sensor or true rich condition.
- Check short/voltage: key ON engine OFF backprobe the signal wire — it should not be battery voltage. With engine running, measure voltage; if constant battery voltage, trace for short to 12V in harness or connector.
- Check fuel system: measure fuel pressure, inspect injectors for leakage, and review short- and long-term fuel trims. High fuel pressure or positive fuel trims indicate actual rich condition.
- Inspect MAF/MAP/TP sensors and vacuum system; sensor faults upstream can cause incorrect fueling.
- Verify grounds and PCM connector integrity; measure resistance to ground from sensor ground circuit.
- If wiring, grounds and fuel system check good, replace Bank 2 Sensor 1 and clear codes.
- Road test and re-scan to confirm code does not return and sensor waveform/fuel trims return to normal.
Likely causes
- Contaminated or failed oxygen sensor (most common)
- Signal wiring short to battery voltage or pinched connector
- Excess fuel delivery (high fuel pressure or stuck-open injector) causing sensor to read rich
- Bad ground at sensor or ECM connector
- MAF or fuel trim sensor error causing rich running conditions
Fault status
Status
P0152 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): ECM detects sensor signal voltage higher than expected (rich/high-side or possible short to voltage).
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0152
HUMMER
P — Powertrain
Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 2 Sensor 1
Views:
UK: 14
EN: 17
RU: 17
AI status
Completed
Completed
100%
Causes
- Faulty Bank 2 Sensor 1 (upstream O2 sensor) producing a high voltage output
- Signal wire shorted to 12V or other power source
- Poor or missing ground for the sensor circuit or ECM
- Fuel system running rich (high fuel pressure, leaking injectors, faulty fuel pressure regulator)
- Contaminated sensor (oil, coolant, silicone, leaded fuel residues)
- Faulty PCM/ECM (rare)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor fuel economy
- Black smoke or strong fuel smell from exhaust under load
- Possible rough idle or hesitation if rich condition is severe
- Failed emissions/smog test
What to check
- Read freeze frame and stored codes; check for related codes (fuel trim, MAF, other O2 sensors).
- Visually inspect sensor wiring and connector at Bank 2 Sensor 1 for corrosion, damage, pin pushed out, melted insulation or rodent damage.
- Use a scan tool to monitor the Bank 2 Sensor 1 voltage at idle and during load; note if voltage is steady high (>0.8–0.9 V) or shorted to battery.
- Compare Bank 1 and Bank 2 sensor behavior and short/long term fuel trims for signs of real rich condition.
- Check fuel pressure and fuel injectors for leakage or stuck-open condition.
- Backprobe the sensor signal wire with a multimeter/oscilloscope to confirm voltage and waveform; wiggle harness to check for intermittent faults.
Signal parameters
- Typical narrowband O2 sensor signal range: ~0.0 V (lean) to ~1.0 V (rich).
- High-voltage condition commonly flagged when sensor voltage is consistently above ~0.8–0.9 V.
- When properly operating in closed loop, upstream sensor should switch regularly between low and high (several times per second depending on engine).
- Heater circuit: resistance and supply vary by sensor (typical resistance a few ohms to a few tens of ohms); heater should reach operating temperature quickly after start.
Diagnostic algorithm
- Connect a scan tool, record freeze frame and live data for Bank 2 Sensor 1, fuel trims, MAF, and related sensors. Note conditions (engine temp, load, RPM).
- Verify bank identification (confirm which bank is bank 2 on this engine).
- Visually inspect sensor harness and connector for damage, corrosion, or signs of short/high-temperature damage.
- With engine running and warmed, monitor the O2 sensor voltage. If it is fixed high (near 1.0 V) or does not switch, suspect sensor or true rich condition.
- Check short/voltage: key ON engine OFF backprobe the signal wire — it should not be battery voltage. With engine running, measure voltage; if constant battery voltage, trace for short to 12V in harness or connector.
- Check fuel system: measure fuel pressure, inspect injectors for leakage, and review short- and long-term fuel trims. High fuel pressure or positive fuel trims indicate actual rich condition.
- Inspect MAF/MAP/TP sensors and vacuum system; sensor faults upstream can cause incorrect fueling.
- Verify grounds and PCM connector integrity; measure resistance to ground from sensor ground circuit.
- If wiring, grounds and fuel system check good, replace Bank 2 Sensor 1 and clear codes.
- Road test and re-scan to confirm code does not return and sensor waveform/fuel trims return to normal.
Likely causes
- Contaminated or failed oxygen sensor (most common)
- Signal wiring short to battery voltage or pinched connector
- Excess fuel delivery (high fuel pressure or stuck-open injector) causing sensor to read rich
- Bad ground at sensor or ECM connector
- MAF or fuel trim sensor error causing rich running conditions
Fault status
Status
P0152 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): ECM detects sensor signal voltage higher than expected (rich/high-side or possible short to voltage).
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0152
LAND ROVER
P — Powertrain
O2 sensor circuit high voltage (bank 2 sensor 1)
Views:
UK: 8
EN: 9
RU: 10
AI status
Completed
Completed
100%
Causes
- Faulty Bank 2 Sensor 1 (upstream O2 sensor) producing a high voltage output
- Signal wire shorted to 12V or other power source
- Poor or missing ground for the sensor circuit or ECM
- Fuel system running rich (high fuel pressure, leaking injectors, faulty fuel pressure regulator)
- Contaminated sensor (oil, coolant, silicone, leaded fuel residues)
- Faulty PCM/ECM (rare)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor fuel economy
- Black smoke or strong fuel smell from exhaust under load
- Possible rough idle or hesitation if rich condition is severe
- Failed emissions/smog test
What to check
- Read freeze frame and stored codes; check for related codes (fuel trim, MAF, other O2 sensors).
- Visually inspect sensor wiring and connector at Bank 2 Sensor 1 for corrosion, damage, pin pushed out, melted insulation or rodent damage.
- Use a scan tool to monitor the Bank 2 Sensor 1 voltage at idle and during load; note if voltage is steady high (>0.8–0.9 V) or shorted to battery.
- Compare Bank 1 and Bank 2 sensor behavior and short/long term fuel trims for signs of real rich condition.
- Check fuel pressure and fuel injectors for leakage or stuck-open condition.
- Backprobe the sensor signal wire with a multimeter/oscilloscope to confirm voltage and waveform; wiggle harness to check for intermittent faults.
Signal parameters
- Typical narrowband O2 sensor signal range: ~0.0 V (lean) to ~1.0 V (rich).
- High-voltage condition commonly flagged when sensor voltage is consistently above ~0.8–0.9 V.
- When properly operating in closed loop, upstream sensor should switch regularly between low and high (several times per second depending on engine).
- Heater circuit: resistance and supply vary by sensor (typical resistance a few ohms to a few tens of ohms); heater should reach operating temperature quickly after start.
Diagnostic algorithm
- Connect a scan tool, record freeze frame and live data for Bank 2 Sensor 1, fuel trims, MAF, and related sensors. Note conditions (engine temp, load, RPM).
- Verify bank identification (confirm which bank is bank 2 on this engine).
- Visually inspect sensor harness and connector for damage, corrosion, or signs of short/high-temperature damage.
- With engine running and warmed, monitor the O2 sensor voltage. If it is fixed high (near 1.0 V) or does not switch, suspect sensor or true rich condition.
- Check short/voltage: key ON engine OFF backprobe the signal wire — it should not be battery voltage. With engine running, measure voltage; if constant battery voltage, trace for short to 12V in harness or connector.
- Check fuel system: measure fuel pressure, inspect injectors for leakage, and review short- and long-term fuel trims. High fuel pressure or positive fuel trims indicate actual rich condition.
- Inspect MAF/MAP/TP sensors and vacuum system; sensor faults upstream can cause incorrect fueling.
- Verify grounds and PCM connector integrity; measure resistance to ground from sensor ground circuit.
- If wiring, grounds and fuel system check good, replace Bank 2 Sensor 1 and clear codes.
- Road test and re-scan to confirm code does not return and sensor waveform/fuel trims return to normal.
Likely causes
- Contaminated or failed oxygen sensor (most common)
- Signal wiring short to battery voltage or pinched connector
- Excess fuel delivery (high fuel pressure or stuck-open injector) causing sensor to read rich
- Bad ground at sensor or ECM connector
- MAF or fuel trim sensor error causing rich running conditions
Fault status
Status
P0152 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): ECM detects sensor signal voltage higher than expected (rich/high-side or possible short to voltage).
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0152
MITSUBISHI
P — Powertrain
Oxygen sensor2(front) high
Views:
UK: 10
EN: 6
RU: 18
AI status
Completed
Completed
100%
Causes
- Faulty Bank 2 Sensor 1 (upstream O2 sensor) producing a high voltage output
- Signal wire shorted to 12V or other power source
- Poor or missing ground for the sensor circuit or ECM
- Fuel system running rich (high fuel pressure, leaking injectors, faulty fuel pressure regulator)
- Contaminated sensor (oil, coolant, silicone, leaded fuel residues)
- Faulty PCM/ECM (rare)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor fuel economy
- Black smoke or strong fuel smell from exhaust under load
- Possible rough idle or hesitation if rich condition is severe
- Failed emissions/smog test
What to check
- Read freeze frame and stored codes; check for related codes (fuel trim, MAF, other O2 sensors).
- Visually inspect sensor wiring and connector at Bank 2 Sensor 1 for corrosion, damage, pin pushed out, melted insulation or rodent damage.
- Use a scan tool to monitor the Bank 2 Sensor 1 voltage at idle and during load; note if voltage is steady high (>0.8–0.9 V) or shorted to battery.
- Compare Bank 1 and Bank 2 sensor behavior and short/long term fuel trims for signs of real rich condition.
- Check fuel pressure and fuel injectors for leakage or stuck-open condition.
- Backprobe the sensor signal wire with a multimeter/oscilloscope to confirm voltage and waveform; wiggle harness to check for intermittent faults.
Signal parameters
- Typical narrowband O2 sensor signal range: ~0.0 V (lean) to ~1.0 V (rich).
- High-voltage condition commonly flagged when sensor voltage is consistently above ~0.8–0.9 V.
- When properly operating in closed loop, upstream sensor should switch regularly between low and high (several times per second depending on engine).
- Heater circuit: resistance and supply vary by sensor (typical resistance a few ohms to a few tens of ohms); heater should reach operating temperature quickly after start.
Diagnostic algorithm
- Connect a scan tool, record freeze frame and live data for Bank 2 Sensor 1, fuel trims, MAF, and related sensors. Note conditions (engine temp, load, RPM).
- Verify bank identification (confirm which bank is bank 2 on this engine).
- Visually inspect sensor harness and connector for damage, corrosion, or signs of short/high-temperature damage.
- With engine running and warmed, monitor the O2 sensor voltage. If it is fixed high (near 1.0 V) or does not switch, suspect sensor or true rich condition.
- Check short/voltage: key ON engine OFF backprobe the signal wire — it should not be battery voltage. With engine running, measure voltage; if constant battery voltage, trace for short to 12V in harness or connector.
- Check fuel system: measure fuel pressure, inspect injectors for leakage, and review short- and long-term fuel trims. High fuel pressure or positive fuel trims indicate actual rich condition.
- Inspect MAF/MAP/TP sensors and vacuum system; sensor faults upstream can cause incorrect fueling.
- Verify grounds and PCM connector integrity; measure resistance to ground from sensor ground circuit.
- If wiring, grounds and fuel system check good, replace Bank 2 Sensor 1 and clear codes.
- Road test and re-scan to confirm code does not return and sensor waveform/fuel trims return to normal.
Likely causes
- Contaminated or failed oxygen sensor (most common)
- Signal wiring short to battery voltage or pinched connector
- Excess fuel delivery (high fuel pressure or stuck-open injector) causing sensor to read rich
- Bad ground at sensor or ECM connector
- MAF or fuel trim sensor error causing rich running conditions
Fault status
Status
P0152 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): ECM detects sensor signal voltage higher than expected (rich/high-side or possible short to voltage).
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email